One of the most famous pubs in Sydney, the Harbour View Hotel, Sydney Rocks, will test the market.

The media heir will have a new tech venture to discuss when he joins the other billionaires milling about at the annual Allen & Co. retreat in Idaho next month.

As world leaders meet for the G-20 summit in Japan, it's clear that radical steps may be the only chance to save capitalism and democracy.

It's not too hard to imagine a vicious cycle in which hot weather begets more demand for air con, and thus for power. That in turn means more emissions, which lead to hotter temperatures.

The software blamed for the Lion Air and Ethiopian Airlines disasters was developed at a time Boeing was laying off experienced engineers and cutting costs.